How to Remove Black Spots & Lichen from Sandstone Slabs | Patio Cleaning

[@MIchelleSpratt-s6r]

Great job, brings out the different colours 😊

[@Renovation-Dan]

Thanks, we’re very happy with how it turned out

[@t.b.1596]

I have a brick driveway and get those pesky black spots. Thank you for the video because now I know how to remove. By the way...beautiful stone work!

[@Renovation-Dan]

Thank you, I’m really happy with how they turned out considering I thought they were all one grey colour. We’ve got a block paving driveway and I use the sodium hypo on that and it works well too.

[@t.b.1596]

@@Renovation-Dan Oh, I have a question. Would a sealer on the stones help keep the black moss away? As I wrote, I have brick and I was wondering about sealer on my brick. Also is this the product that roofers use on the roof for a soft wash to kill the moss??

[@Renovation-Dan]

@@t.b.1596 yes sealer definitely helps. Theres another video on the channel of sealing our path and patio but because these slabs are freshly laid, I won’t seal these until next summer. The chemicals used for cleaning roofs is a biocide that is slightly different, it works over a longer time period.

[@t.b.1596]

@@Renovation-Dan thank you!

[@daniellebooth9667]

❤❤❤ interesting love this

[@Renovation-Dan]

Thanks 🤩

[@robinspratt6057]

Very effective👍 Would household bleach do the same or is the concentrated chemical necessary?

[@Renovation-Dan]

It would work to some extent but wouldn’t be as effective as the concentrate